﻿/*
 * Copyright (c) 2025 HiEasyX
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/**
 * \file Canvas.cpp
 * \brief The xample of the usage of canvas control
 */

#include <include/hex.h>
#include <include/impl/EasyX/hex_impl_easyx.h>

double f(const double &x) {
	return -(sin(clock() / 1000.f * x) * tan(x));
}

void Draw(HXBufferPainter *Painter, HXPoint Size) {
	const int width      = Size.X;
	const int height     = Size.Y;
	const int halfWidth  = width / 2;
	const int halfHeight = height / 2;

	Painter->DrawLine({0, halfHeight}, {width, halfHeight}, HXColor{255, 0, 0, 255});
	Painter->DrawLine({halfWidth, 0}, {halfWidth, height}, HXColor{255, 0, 0, 255});

	constexpr double step  = 0.06;
	constexpr double scale = 17;
	double           x0    = -halfWidth * step;

	for (int pixel = -halfWidth; pixel < halfWidth; ++pixel) {
		double result = f(x0);
		double next   = f(x0 + step);

		double omega = f(x0 + step / 100);

		if (next > result) {
			if (omega > result) {
				Painter->DrawLine({pixel + halfWidth, (int)(result * scale) + halfHeight},
				                  {pixel + 1 + halfWidth, (int)(next * scale) + halfHeight}, HXColor{255, 255, 0, 255});
			}
		} else {
			if (omega < result) {
				Painter->DrawLine({pixel + halfWidth, (int)(result * scale) + halfHeight},
				                  {pixel + 1 + halfWidth, (int)(next * scale) + halfHeight}, HXColor{255, 255, 0, 255});
			}
		}

		x0 += step;
	}
}

int main() {
	initgraph(640, 480);

	BeginBatchDraw();

	HX::HXInitForEasyX();
	HX::SetBuffer(GetWorkingImage());

	setbkcolor(RGB(180, 180, 180));

	HX::WindowProfile windowProfile;
	windowProfile.Size = {600, 400};

	while (true) {
		cleardevice();

		HX::HXBegin();

		ExMessage message{};
		while (peekmessage(&message)) {
			HX::PushMessage(HX::GetHXMessage(&message));
		}

		HX::Window(HXStr("画布控件示例"), windowProfile);
		HX::Canvas(windowProfile.Size, Draw);

		HX::End();
		HX::Render();

		FlushBatchDraw();

		Sleep(1);
	}

	return 0;
}
